Kurt Sutter is not happy that Discovery keeps calling upcoming reality series The Devils Ride a “real-life Sons of Anarchy.” And when Kurt Sutter is upset, he doesn’t stew in silence. “if DEVIL’S RIDE is gonna advertise itself as a ‘real-life SOA’ then i get to weigh in. they’re f—ing with my brand and they sure AIN’T it,” the Anarchy showrunner tweeted last night.

Sutter is notoriously outspoken on his Twitter page; previous targets of his wrath include Mad Men creator Matthew Weiner, whom Sutter blamed when AMC fired Frank Darabont from The Walking Dead. (Sutter briefly quit Twitter after the resulting brouhaha.) This time, though, his comments might get him in real trouble – the kind that comes with a hospital bill.

TMZ got in touch with a “very scary” guy who goes by Sandman – a member of the motorcycle club profiled in Devils Ride – to get a response to Sutter’s comments. Here’s what the hog head had to say: “I am concerned that Kurt’s creative mind is stuck in make-believe land with his recent comment on Twitter. Here’s a reality check for ya Kurt…. I am sending a personal invitation to your pretty-faced Kurt Cobain look-alike star Jax [SOA star Charlie Hunnam] to come down to San Diego and prove your point. And tell him to wear those shiny white kicks too. I hope he’s a size 11, I could use some new shoes.”

Yikes. So far, though, Sutter’s taking Sandman’s challenge in stride. This morning, he posted another scathing tweet that accuses Devils Ride of “exploit[ing]” Anarchy. A few minutes later, Sutter also implicitly laughed off Sandman’s threatening remarks by defending his star’s cred: “the reality is that hunnam is probably the toughest f—ing dude on my set. newcastle street kid. he’s the last guy i’d ever pick to fight,” he tweeted. Considering that Sutter now has his own Discovery reality series, maybe he’s not worried – the network wouldn’t let its own talent turn against each other, right?

This macho back-and-forth almost certainly won’t come to blows. Still, what if other TV showrunners follow Sutter’s incendiary lead? Matthew Weiner could start a nasty ad war with the agencies featured in The Pitch. Game of Thrones exec producers David Benioff and D. B. Weiss might be embroiled in an imaginary war after insulting LARPers. Vince Gilligan of Breaking Bad could lob insults at real-life drug kingpins. Maybe that last one wouldn’t end well.